native test: Add coarray allocation, test type compliance

[bonachea]

Exercises the features added in llvm/llvm-project#182110

Now also checks that available types in ISO_FORTRAN_ENV match PRIF's representational requirements.

Also, add some output regarding PRIF type properties to the prit_types_test, example output (flang-latest):

PRIF Types
   prif_coarray_handle :   8 bytes,   8-byte aligned
   prif_team_type      :  40 bytes,   8-byte aligned
   prif_event_type     :   8 bytes,   8-byte aligned
   prif_notify_type    :   8 bytes,   8-byte aligned
   prif_lock_type      :   4 bytes,   4-byte aligned
   prif_critical_type  :   4 bytes,   4-byte aligned

[bonachea]

Here is output of the updated native multi-image test in CI using flang-latest on Linux

[...]
Testing TEAM_TYPE...
  Size of TEAM_TYPE: 8 bytes ==> FAIL (should be exactly 40 bytes)
  Default init of TEAM_TYPE ==> FAIL (not default-initialized to null(): FF FF FF FF FF FF FF FF)
Testing TEAMS...
[...]
Testing EVENT_TYPE...
  Size of EVENT_TYPE: 8 bytes ==> FAIL (should be >= [64](https://github.com/BerkeleyLab/caffeine/actions/runs/27106399914/job/79996225964?pr=328#step:19:65) bytes)
  Default init of EVENT_TYPE ==> FAIL (non-zero value at byte 1: FF FF FF FF FF FF FF FF)
Testing LOCK_TYPE...
  Size of LOCK_TYPE: 8 bytes ==> FAIL (should be >= 64 bytes)
  Default init of LOCK_TYPE ==> FAIL (non-zero value at byte 1: FF FF FF FF FF FF FF FF)
Testing NOTIFY_TYPE...
  Size of NOTIFY_TYPE: 8 bytes ==> FAIL (should be >= 64 bytes)
  Default init of NOTIFY_TYPE ==> FAIL (non-zero value at byte 1: FF FF FF FF FF FF FF FF)
Testing ALLOCATABLE coarrays...
app/native-multi-image.F90:267: ERROR:  ALLOCATED(aca_int_1) = false
app/native-multi-image.F90:268: ERROR:  ALLOCATED(aca_int_2) = false
app/native-multi-image.F90:269: ERROR:  ALLOCATED(aca_int_3) = false
[...]
ERROR: 11 tests FAILED.
WARNING: Ignoring 11 failures.
Fortran STOPFortran STOPFortran STOPFortran STOP

[ktras]

LGTM